﻿using MobileClient.Common;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Graphics.Display;
using Windows.UI.ViewManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using MobileClient.DataModel;
using System.Net.Http;
using System.Net.Http.Headers;
using Windows.Data.Json;
using System.Collections.ObjectModel;

// The Basic Page item template is documented at http://go.microsoft.com/fwlink/?LinkID=390556

namespace MobileClient.Views
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class AllEvents : Page
    {
        private NavigationHelper navigationHelper;
        private ObservableDictionary defaultViewModel = new ObservableDictionary();

        private ObservableCollection<Event> _eventList = new ObservableCollection<Event>();

        private List<Event> eventList;
        private HttpClient httpClient;

        public AllEvents()
        {
            this.InitializeComponent();

            this.navigationHelper = new NavigationHelper(this);
            this.navigationHelper.LoadState += this.NavigationHelper_LoadState;
            this.navigationHelper.SaveState += this.NavigationHelper_SaveState;

            // Used to connect Web API
            this.InitializeComponent();
            httpClient = new HttpClient();
            httpClient.BaseAddress = new Uri("http://localhost:60423/");
            httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            // Limit the max buffer size for the response so we don't get overwhelmed
            httpClient.MaxResponseContentBufferSize = 266000;

            // List of events used as datasource
            eventList = new List<Event>();
        }

        /// <summary>
        /// Gets the <see cref="NavigationHelper"/> associated with this <see cref="Page"/>.
        /// </summary>
        public NavigationHelper NavigationHelper
        {
            get { return this.navigationHelper; }
        }

        /// <summary>
        /// Gets the view model for this <see cref="Page"/>.
        /// This can be changed to a strongly typed view model.
        /// </summary>
        public ObservableDictionary DefaultViewModel
        {
            get { return this.defaultViewModel; }
        }

        /// <summary>
        /// Populates the page with content passed during navigation.  Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="sender">
        /// The source of the event; typically <see cref="NavigationHelper"/>
        /// </param>
        /// <param name="e">Event data that provides both the navigation parameter passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
        /// a dictionary of state preserved by this page during an earlier
        /// session.  The state will be null the first time a page is visited.</param>
        private void NavigationHelper_LoadState(object sender, LoadStateEventArgs e)
        {
        }

        /// <summary>
        /// Preserves state associated with this page in case the application is suspended or the
        /// page is discarded from the navigation cache.  Values must conform to the serialization
        /// requirements of <see cref="SuspensionManager.SessionState"/>.
        /// </summary>
        /// <param name="sender">The source of the event; typically <see cref="NavigationHelper"/></param>
        /// <param name="e">Event data that provides an empty dictionary to be populated with
        /// serializable state.</param>
        private void NavigationHelper_SaveState(object sender, SaveStateEventArgs e)
        {
        }

        #region NavigationHelper registration

        /// <summary>
        /// The methods provided in this section are simply used to allow
        /// NavigationHelper to respond to the page's navigation methods.
        /// <para>
        /// Page specific logic should be placed in event handlers for the  
        /// <see cref="NavigationHelper.LoadState"/>
        /// and <see cref="NavigationHelper.SaveState"/>.
        /// The navigation parameter is available in the LoadState method 
        /// in addition to page state preserved during an earlier session.
        /// </para>
        /// </summary>
        /// <param name="e">Provides data for navigation methods and event
        /// handlers that cannot cancel the navigation request.</param>
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            this.navigationHelper.OnNavigatedTo(e);
            GetEvents();
        }

        protected override void OnNavigatedFrom(NavigationEventArgs e)
        {
            this.navigationHelper.OnNavigatedFrom(e);
        }

        #endregion

        private void ListView_ItemClick(object sender, ItemClickEventArgs e)
        {
            Frame.Navigate(typeof(EventPage), e.ClickedItem);
        }

        // Use Web Api to get Json data of all events. Parse every json object to event objects.
        private async void GetEvents()
        {
            var response = await httpClient.GetAsync("api/Event");
            if (response.IsSuccessStatusCode)
            {
                var nEvent = await response.Content.ReadAsStringAsync();
                var eve = JsonArray.Parse(nEvent);

                foreach (var item in eve)
                {
                    Event newEvent = new Event();

                    newEvent.Event_EventId = Convert.ToInt32(item.GetObject()["EventId"].GetNumber());
                    newEvent.Event_Title = item.GetObject()["Title"].GetString();
                    newEvent.Event_Description = item.GetObject()["Description"].GetString();
                    newEvent.Event_Address = item.GetObject()["Address"].GetString();
                    newEvent.Event_ZipCode = Convert.ToInt32(item.GetObject()["ZipCode"].GetNumber());
                    newEvent.Event_City = item.GetObject()["City"].GetString();
                    newEvent.Event_Price = Convert.ToInt32(item.GetObject()["Price"].GetNumber());
                    newEvent.Event_Date = item.GetObject()["Date"].GetString();
                    newEvent.Event_Time = item.GetObject()["Time"].GetString();

                    _eventList.Add(newEvent);
                }

                EventDetails.ItemsSource = _eventList;
            }
        }

        private void btnRefresh_Click(object sender, RoutedEventArgs e)
        {
            _eventList.Clear();
            GetEvents();
        }

    }
}
